I am aware several Pantera vendors sell the Weiand pump. I don't understand why. If you do not recirc water during warm up, if no water is flowing into the engine block, the heads WILL develope steam pockets. I do not consider that a desirable thing. If anyone is running the Weiand pump, I suggest they run their heater valve open until the car warms up. That is the most expedient fix until something better can be done.
In the mean time, here's 2 pics of the pump I'll be installing in my Pantera, George
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